61137205 has 4 divisors (see below), whose sum is σ = 73364652. Its totient is φ = 48909760.

The previous prime is 61137203. The next prime is 61137211. The reversal of 61137205 is 50273116.

61137205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29844369 + 31292836 = 5463^2 + 5594^2 .

It is not a de Polignac number, because 61137205 - 2¹ = 61137203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61137205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61137203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6113716 + ... + 6113725.

It is an arithmetic number, because the mean of its divisors is an integer number (18341163).

Almost surely, 2^61137205 is an apocalyptic number.

It is an amenable number.

61137205 is a deficient number, since it is larger than the sum of its proper divisors (12227447).

61137205 is a wasteful number, since it uses less digits than its factorization.

61137205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12227446.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61137205 is about 7819.0283923260. The cubic root of 61137205 is about 393.9446377931.

The spelling of 61137205 in words is "sixty-one million, one hundred thirty-seven thousand, two hundred five".